I ask Jonathan to pick any 5 cards out of a deck with no Jokers.
He can inspect then shuffle the deck before picking any five cards. He picks out 5 cards then hands them to me (Peter can't see any of this). I look at the cards and I pick 1 card out and give it back to Jonathan. I then arrange the other four cards in a special way, and give those 4 cards all face down, and in a neat pile, to Peter. Peter looks at the 4 cards i gave him, and says out loud which card jonathan is holding (suit and number). How? (The solution uses logic, not sleight of hand)